Question

If a:b=2:3, a:c=3:4 and b:d=5:2, find c:d.

Answer 1

@hartnn

Answer 2

b=3/2a c=4/3a d=2/5b=3/5a substitute and find value

Answer 3

how?

Answer 4

c= 4/3 *a and d=3/5*a so what is c:d?

Answer 5

\[\frac{ c }{ d }=\frac{ \frac{ 4 }{3 }a}{ \frac{ 3 }{ 5 }a }\]

Answer 6

20:9 ?

Answer 7

correct

Answer 8

an alternate way :
a:b=2:3, a:c=3:4
divide these 2 equations,

or simply first flip a:c=3:4 to get the value of c:a
then multiply a:b times c:a